CN116224619A - Three-dimensional display equipment of intensive viewpoint - Google Patents
Three-dimensional display equipment of intensive viewpoint Download PDFInfo
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- CN116224619A CN116224619A CN202310452214.1A CN202310452214A CN116224619A CN 116224619 A CN116224619 A CN 116224619A CN 202310452214 A CN202310452214 A CN 202310452214A CN 116224619 A CN116224619 A CN 116224619A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers
Abstract
The invention discloses a three-dimensional display device with dense view points, which comprises an LED screen, a collimating lens array, a reflecting array and a diffraction grating array, wherein the LED screen comprises a plurality of LED light sources which are distributed in an array mode, the collimating lens array comprises a plurality of collimating lenses, the reflecting array comprises a plurality of inclined reflectors which are distributed in an array mode, the inclined reflectors are used for reflecting collimated light beams emitted by the collimating lenses to the diffraction grating array, the irradiation points of the collimated light beams on the diffraction grating array are staggered with the LED light sources, and the diffraction grating array is used for controlling the collimated light beams to emit according to different angles of the horizontal direction according to the preset structural difference of the diffraction grating so as to enable the three-dimensional display device to form different parallax images at different positions of the horizontal direction. The invention can enable the display equipment to form different parallax images in different horizontal directions, thereby constructing stereoscopic vision, realizing three-dimensional display of the stereoscopic images and better meeting application requirements.
Description
Technical Field
The present invention relates to a three-dimensional display, and more particularly, to a three-dimensional display device with dense viewpoints.
Background
With the vigorous development of information technology and content industry technology, the display effect of a two-dimensional plane gradually meets the visual requirements of people, and in contrast, the three-dimensional display requirement that the display effect is more natural and has more immersion is continuously rising, and corresponding software and hardware of various three-dimensional displays are developed and developed. The LED display screen is focused more and more in industry by virtue of the advantages of high brightness, no frame splicing and the like, the pixel quantity of a unit area is continuously enlarged, various novel LED display technologies such as mini-LED, micro-LED and the like are derived, and display tests of the LED display screen and the lenticular lens grating are performed on the basis, but the current three-dimensional display equipment based on the LED display screen and the lenticular lens grating is limited by the defects of display quality and viewpoint quantity and has not been applied in a large scale.
As shown in connection with fig. 1 and 2, based on the relationship that the spatial resolution of the three-dimensional image and the number of viewpoints are mutually restricted in the three-dimensional display of the lenticular array, increasing the number of viewpoints reduces the spatial resolution, and vice versa. In addition, the reduction of the spatial resolution can lead to unclear three-dimensional images, serious granular sensation, insufficient parallax smoothness caused by insufficient number of points, and limit the clear depth range.
Disclosure of Invention
The invention aims to solve the technical problem of providing a three-dimensional display device which can enable the display device to form different parallax images in different horizontal directions so as to construct stereoscopic vision and realize dense view points of stereoscopic image display.
In order to solve the technical problems, the invention adopts the following technical scheme.
The utility model provides a three-dimensional display device of intensive viewpoint, its includes LED screen, collimating lens array, reflection array and diffraction grating array, collimating lens array is located the front side of LED screen, reflection array is located the front side of collimating lens array, diffraction grating array is located the front side of reflection array, the LED screen is including a plurality of LED light sources that are array distribution, collimating lens array includes a plurality of collimating lenses, collimating lens with LED light source one-to-one, reflection array includes a plurality of slant reflector that are array distribution, slant reflector with collimating lens one-to-one, just slant reflector is used for with the collimated light beam reflection of collimating lens arrive diffraction grating array, the collimated light beam on diffraction grating array the irradiation point with LED light source is crisscross to be set up, diffraction grating array is used for controlling each collimated light beam according to the different angle outgoing of horizontal direction of diffraction grating preset structural difference to make three-dimensional display device forms different parallax images in the different positions of horizontal direction.
Preferably, the LED screen includes a red light area, a green light area and a blue light area, where the red light area, the green light area and the blue light area are periodically distributed in a square shape, and the red light area, the green light area and the blue light area are respectively distributed in the LED light sources corresponding to the color light.
Preferably, three kinds of collimating lenses are respectively arranged in the collimating lens array corresponding to the three kinds of LED light sources.
Preferably, the collimating lens is an aspherical lens.
Preferably, the oblique reflector is used for enabling the diffraction zero-order light to exit from an angle which forms an included angle of more than 45 degrees with the horizontal direction through the arrangement of the optical path of the oblique incidence diffraction grating.
In the three-dimensional display device with dense view points, the light source of the LED screen emits scattered light, the light beam collimation is realized through the corresponding collimating lens array, and the direction of the collimated light beam is changed through the reflecting array with a fixed inclination angle, so that the diffraction zero aurora formed after passing through the diffraction grating array avoids the sight line direction of a viewer and is emitted from the obliquely lower part of the device at a certain angle. According to the invention, the direction of the light beam is further changed through the diffraction grating, and the light beam is controlled to different angles in the horizontal direction according to the structural difference of the diffraction grating, so that different parallax images are formed in different horizontal directions by the display equipment, and then, stereoscopic vision is constructed, three-dimensional display of the stereoscopic image is realized, and the application requirements are well met.
Drawings
FIG. 1 is a schematic diagram of a lenticular display apparatus;
FIG. 2 is a schematic view of a lenticular display view;
FIG. 3 is a schematic diagram of two conventional LED screens;
FIG. 4 is a schematic view of a three-dimensional display device with dense view points according to the present invention;
FIG. 5 is a schematic view of the optical path of the three-dimensional display device with dense viewpoints according to the present invention;
FIG. 6 is a schematic diagram of an LED screen according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an LED display screen and a corresponding collimating lens according to an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a design and simulation of a collimating lens according to an embodiment of the present invention;
FIG. 9 is a schematic view of diffraction angles of a diffraction grating;
fig. 10 is a schematic cross-sectional view of a diffraction grating.
Description of the embodiments
The invention is described in more detail below with reference to the drawings and examples.
The invention discloses a three-dimensional display device with dense view points, which is shown in combination with fig. 4 and 5 and comprises an LED screen 1, a collimating lens array 2, a reflecting array 3 and a diffraction grating array 4, wherein the collimating lens array 2 is positioned at the front side of the LED screen 1, the reflecting array 3 is positioned at the front side of the collimating lens array 2, the diffraction grating array 4 is positioned at the front side of the reflecting array 3, the LED screen 1 comprises a plurality of LED light sources 10 distributed in an array mode, the collimating lens array 2 comprises a plurality of collimating lenses 20, the collimating lenses 20 are in one-to-one correspondence with the LED light sources 10, the reflecting array 3 comprises a plurality of inclined reflectors 30 distributed in an array mode, the inclined reflectors 30 are in one-to-one correspondence with the collimating lenses 20, the inclined reflectors 30 are used for reflecting collimated light beams emitted by the collimating lenses 20 to the diffraction grating array 4, irradiation points of the collimated light beams on the diffraction grating array 4 are staggered with the LED light sources 10, the diffraction grating array 4 is used for controlling the emergent light beams to form different parallax images according to different horizontal parallax angles of the preset diffraction grating structures, and the three-dimensional display device is formed according to different horizontal parallax angles.
In the above structure, the light source of the LED screen 1 emits scattered light, the light beam is collimated by the corresponding collimating lens array 2, and the collimated light beam changes the direction of the light beam by the reflecting array 3 with a fixed inclination angle, so that the diffraction zero polarized light formed after passing through the diffraction grating array 4 avoids the sight line direction of the viewer and exits from the obliquely lower side of the device at a certain angle. According to the invention, the direction of the light beam is further changed through the diffraction grating, and the light beam is controlled to different angles in the horizontal direction according to the structural difference of the diffraction grating, so that different parallax images are formed in different horizontal directions by the display equipment, and then, stereoscopic vision is constructed, three-dimensional display of the stereoscopic image is realized, and the application requirements are well met.
Referring to fig. 6, in the present embodiment, the LED screen 1 includes a red light area 11, a green light area 12 and a blue light area 13, the red light area 11, the green light area 12 and the blue light area 13 are distributed in a square periodic manner, and the red light area 11, the green light area 12 and the blue light area 13 are respectively distributed in the LED light sources 10 corresponding to the color light.
In contrast to the conventional LED screen shown in fig. 3, the LED screen 1 according to the present invention is specially designed to manufacture each light emitting module as a single color light, so that the frequency of the light beam emitted from the single light emitting module does not decrease in display quality due to the excessive frequency gap when the subsequent collimation, reflection and diffraction are performed, and fig. 6 shows one of the LED screens preferably specially designed, in which the LED light sources of three colors are arranged according to a 3×3 square period. In this embodiment, the single LED light emitting region includes only one of three colors of red, green and blue, the spectrum half-width of each color light is less than 30nm, the color arrangement is uniformly and periodically distributed, and the minimum period arrangement is a rectangular array of 3×3, and the rectangular array is composed of 3 red light emitting regions, 3 green light emitting regions and 3 blue light emitting regions.
Referring to fig. 7, as a preferred manner, three kinds of collimating lenses 20 are respectively disposed in the collimating lens array 2 corresponding to the three kinds of LED light sources 10. Further, the collimating lens 20 is an aspherical lens.
In particular, in the present embodiment, the light source beam passes through the collimator lens array to obtain a light divergence angle
The method comprises the following steps: />
The method ensures that the light beams emitted by each diffraction grating can accurately construct the view point, and avoids forming aliasing.
In this embodiment, the collimating lens array 2 is formed by periodically arranging a plurality of collimating lenses 20, each collimating lens 20 corresponds to a light emitting module of an LED display screen, and since the light emitting module has 3 kinds of color lights, each collimating lens array is also formed by three kinds of lenses, and the three kinds of lenses respectively collimate the three kinds of color lights, the surface types thereof have various choices, and the choices will be made according to the differences between the LED screen and the diffraction grating. Specifically, the configuration shown in fig. 7 is a typical surface shape of an aspherical lens, and fig. 8 is a schematic diagram of a simulation of an aspherical lens.
Referring to fig. 5 and 9, the oblique mirror 30 is configured to make the diffracted zero-order light exit from an angle of 45 ° or more with respect to the horizontal direction by setting an optical path of the oblique incidence diffraction grating. In this embodiment, the reflective array 3 is formed by periodically arranging a plurality of the oblique reflectors 30 with a fixed angle, and the fixed angle is set in such a way that the main ray direction of the collimated light beam is adjusted to be oblique incidence, and the diffraction zero-order light is emitted from an angle of 45 ° or more with the horizontal direction by setting the optical path of the oblique incidence diffraction grating, so as to prevent interference of the diffraction zero-order light.
Specifically, an included angle of 60 degrees or 67.5 degrees exists between the fixed angle of the oblique reflective mirror 30 and the LED screen 1, so that diffracted zero-order light is emitted from an angle of 45 degrees or 60 degrees with respect to the horizontal direction of the device, and the effect of the light on the display effect is prevented.
In this embodiment, referring to fig. 9, the diffraction angle of the diffraction grating array 4 is:
the method comprises the steps of carrying out a first treatment on the surface of the Wherein λ is the wavelength of light, a is the diffraction order, d is the period of the diffraction grating, θ in For the angle of incidence of light on the diffraction grating, θ out Is the angle of diffraction of the light on the diffraction grating array 4. Based on the above principle, the reflected light beam of the oblique mirror 30 is incident on the diffraction grating array at a specific angle, and the diffraction grating controls the light beam of the corresponding LED light emitting module to different angles.
In this embodiment, the grating characteristics of the diffraction grating (including the intensity, principal angular direction and angular spread of the emitted light) are related to the position of the diffraction grating on the two-dimensional distribution of the grating array and the position of the corresponding mirror, the diffraction grating characteristics being periodically distributed such that the light distribution of the divergent light exhibits periodicity, the grating characteristics further comprising a grating depth configured to determine the intensity of the emitted light scattered by the diffraction grating.
Referring to fig. 10, taking a display period of 3×3 as an example, a result of angle modulation of a beam of the LED light emitting module corresponding thereto by the diffraction grating is shown. According to the LED screen, each LED light-emitting module is manufactured into single-color light through special design, so that the frequency of light beams emitted by a single light-emitting module is free from degradation of display quality caused by overlarge frequency difference when subsequent collimation, reflection and diffraction are carried out. Meanwhile, the collimating lens array is formed by periodically arranging lenses, the lenses respectively correspond to the light-emitting modules of the LED display screen, each collimating lens array is also formed by three lenses because the light-emitting modules are provided with 3 kinds of color light, the three kinds of lenses respectively collimate the three kinds of color light, the surface types of the three kinds of lenses are provided with various choices, and the choices are selected according to the difference between the LED screen and the diffraction grating. Further, the light reflecting array is composed of periodically distributed reflectors arranged at a fixed angle, and the collimated light beam enters the diffraction grating array after being reflected by the light reflecting array. On this basis, the diffraction grating array is composed of diffraction gratings distributed periodically, the arrangement mode and the structural characteristics of the diffraction grating array are related to the three-color light arrangement and the expected light control angle of the LED screen, and the minimum repeating period unit of the arrangement mode and the structural characteristics is square.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and modifications, equivalent substitutions or improvements made within the technical scope of the present invention should be included in the scope of the present invention.
Claims (6)
1. The three-dimensional display device with dense view points is characterized by comprising an LED screen (1), a collimating lens array (2), a reflecting array (3) and a diffraction grating array (4), wherein the collimating lens array (2) is positioned at the front side of the LED screen (1), the reflecting array (3) is positioned at the front side of the collimating lens array (2), the diffraction grating array (4) is positioned at the front side of the reflecting array (3), the LED screen (1) comprises a plurality of LED light sources (10) distributed in an array, the collimating lens array (2) comprises a plurality of collimating lenses (20), the collimating lenses (20) are in one-to-one correspondence with the LED light sources (10), the reflecting array (3) comprises a plurality of inclined reflectors (30) distributed in an array, the inclined reflectors (30) are in one-to-one correspondence with the collimating lenses (20), the inclined reflectors (30) are used for reflecting light beams emitted by the collimating lenses (20) to the diffraction grating array (4), the collimating light beams are emitted by the collimating grating array (4) at the same angle as the diffraction grating array (4) and are arranged in a staggered and different angle from the diffraction grating array (4) according to the preset angle, so that the three-dimensional display device forms different parallax images at different positions in the horizontal direction.
2. The three-dimensional display device of dense viewpoints according to claim 1, wherein the LED screen (1) comprises a red light area (11), a green light area (12) and a blue light area (13), the red light area (11), the green light area (12) and the blue light area (13) are distributed in a square periodic manner, and the red light area (11), the green light area (12) and the blue light area (13) are respectively distributed in the LED light sources (10) of the corresponding colored lights.
3. A dense viewpoint three-dimensional display device according to claim 1, characterized in that three kinds of collimating lenses (20) are provided in the collimating lens array (2) for three kinds of LED light sources (10), respectively.
4. A dense viewpoint three-dimensional display device according to claim 3, wherein the collimating lens (20) is an aspherical lens.
5. A dense viewpoint three-dimensional display device according to claim 1, wherein the oblique mirror (30) is configured to cause diffracted zero order light to exit from an angle of 45 ° or more with respect to the horizontal direction by an optical path arrangement of an oblique incidence diffraction grating.
6. A dense viewpoint three-dimensional display device according to claim 1, wherein the diffraction angle of the diffraction grating array (4) is:
the method comprises the steps of carrying out a first treatment on the surface of the Wherein λ is the wavelength of light, a is the diffraction order, d is the period of the diffraction grating, θ in For the angle of incidence of light on the diffraction grating, θ out Is the diffraction angle of light on the diffraction grating array (4). />
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| CN115308922A (en) * | 2022-10-11 | 2022-11-08 | 深圳臻像科技有限公司 | Static three-dimensional light field display device |
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| CN115308922A (en) * | 2022-10-11 | 2022-11-08 | 深圳臻像科技有限公司 | Static three-dimensional light field display device |
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